The inherent link between precipitation mechanism and mineralogy (invisible gold, cinnabar, stibnite and fluorite) in the Southern Kyrgyzstan Hg-Sb belt

吉尔吉斯斯坦南部汞锑带降水机制与矿物学（隐形金、朱砂、辉锑矿、萤石）的内在联系

• 批准号: 439375585
• 负责人: Professor Dr. Gregor Markl
• 金额: --
• 依托单位: Arbeitsgruppe Petrologie und Mineralische Rohstoffe
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/439375585?language=en
• 关键词: inherent; link; between; precipitation; mechanism

The SW Kyrgysztan Sb-Hg belt comprises about 10 major and minor Sb-Hg deposits some of which are internationally important Sb- or Hg-deposits which show some mineralogical and geochemical peculiarities. For example, some of them have only Stibnite as main ore mineral, some only or mostly cinnabarite, and some both. If this is an effect of "telescoping" or if different precipitation mechanisms are responsible for this observation, is unclear. Some of the deposits show complex Hg-Sb-(Pb-Cu) sulfosalts, even as main ore minerals. Possibly, these complex ores are products of interaction of later hydrothermal solutions with earlier formed ores, hence products of remobilisation. Some of the ores contain significant amounts of old, others not, and, finally, the SW Kyrgyz deposits contain besides quartz also fluorite as an important gangue mineral - which is very unusual and, as far as we know, internationally unique for this type of deposit. The present proposal addresses all these peculiarities and will investigate mineral textures and mineral compositions to establish a mineral succession/sequence of hydrothermal events and their conditions of formation, will analyse fluid inclusions to unravel the composition and physico-chemical conditions of the hydrothermal solutions involved, will try to get a hold on the source and importance of fluorine for the formation of these deposits, will on a district scale (i. e., in several deposits) try to geochemically model the precipitation mechanisms and will try to derive a genetic model for this type of deposits from all these data and modelling results. The project is neatly tied to the sibling project of Prof. Wagner (Aachen).

吉尔吉斯斯坦西南部锑汞矿带由10个大小锑汞矿床组成，其中一些是具有国际重要性的锑汞矿床，具有一定的矿物学和地球化学特征。例如，其中有些仅以辉锑矿为主要矿石矿物，有些仅以朱砂矿为主要矿石矿物，有些则两者兼而有之。如果这是一个“伸缩”的效果，或者如果不同的降水机制负责这一观察，是不清楚的。有些矿床显示出复杂的Hg-Sb-（Pb-Cu）硫盐，甚至是主要的矿石矿物。这些复杂的矿石可能是后期热液与早期形成的矿石相互作用的产物，因此是再活化的产物。有些矿石含有大量的旧矿石，有些则没有，最后，吉尔吉斯西南部的矿床除了石英外，还含有萤石作为重要的脉石矿物--这是非常不寻常的，据我们所知，在国际上这种类型的存款是独一无二的。本提案涉及所有这些特点，并将调查矿物结构和矿物成分，以建立热液事件的矿物序列/顺序及其形成条件，将分析流体包裹体，以揭示所涉热液溶液的成分和物理化学条件，将试图掌握氟的来源和对这些矿床形成的重要性，将在地区范围内（即，例如，在几个矿床中，地球化学研究所将试图建立降水机制的地球化学模型，并将试图从所有这些数据和模型结果中推导出这类矿床的成因模型。该项目与瓦格纳教授（亚琛）的兄弟项目紧密相连。